Baking-oven



E. E. LINDSEY.

BAKING OVEN.

APPLICATaoN FILED APR.16,1919.

1,891,258. Patentedsept. 20,1921.

3 SHEETS-SHEET l.

E. E. 'IINDSI-:Y.

BAKING OVEN.

APPLICATION FILED APR. Ie, 19I9.

Patented sept. 20,1921.

3 SHEETS-SHEET 2.

Atty,

E. E. LINDSEY.

BAKING IOVEN.

APPLICATION. FILED APRJG, 1919'.

f Patented'Sept. 2.0, 1921.

UNITED ,STATES PATENT OFFICE.

ERNEST n LmnsEY, oF sAN FRANCISCO, CALIFORNIA, AssIGNon To BAKE-BITE ovEN MANUFACTURING COMPANY, A ConFonATIoN oF NEVADA.

BAxING-ovEN.

To all lwiz/om t may concern:

Be it known that I, ERNEST El LINDSEY, a citizen of the United States, residingin the city and county ofSan Francisco and State of California, have invented a certain new and useful Improvement in Bakin Ovens, of which the following is aspeci cation.

-My invention relates to improvements in ovens, and it has particular reference to an oven adapted for use of bakers and provided with a bakingchamber inwhich the product to be baked is moved during the .baking process, and the objects of my invention are: v

Flrst, to 4produce a homogeneous wall structure of an exceedlngly strong construction and adapted to maintain a maximum of the heat within the baking chamber;

' OVeIl.

Second, to provide a heat-radiating means and heating means therefor within-the baking chamber so as to produce a maximum of heat from a minimum quantity of fuel;

Third, to heat the product in the baln'ng chamber uniformly;

Fourth, to provide means for carryin the exhaust from the heatingv means away rom vthe baking chamber before the exhaust can reach the product;

Fifth, to provide means for moistening the product during the baking process; and Sixth, to provide an oven which, although v being of maximum capacity, may be easily and, in which: Figure 1 is a -perspective view of my 1m proved oven, parts being broken away and in` section and other parts being removed in v order to show the ame construction and the arrangement of certain interior parts;

Fig. 2 -is a broken and partly sectional front elevation of the oven, the lowershaft, its-sprocket wheels, and the guide blocks in the wall being removed; and

Fig. 3 is a sectional side elevation of the Standards comprising vertical angle bars 1, horizontal lengthwise and transverse angle bars 2 and oblique braces 3, all 'of which are made of iron or any other strong, suitable' metal or material, are riveted or otherwise secured together, as shownv at 4, and thus form a strong and rigid frame 6 for the oven Specification vcilhecters Patent. Patented Sept. 20, 1921. l Application led April 1,6, 1919. Serial No. 290,500.

7 the horizontal tie bars 2 being spaced apart to admit between them bricks 8 of fire-insulating material, such as fire clay, in the top,

the bottom land the sides of the frame 6. In the top and in the sides ofthe frame 6 are placed for reinforcing purposes a metallicreticulum 9 on the inner side of the bricks 8. Another metallic reticulum 12 is placed on the outer sides of the bricks to further reinoven Z has mounted upon the bottom thereof a frame 16, comprising standards in the form of angle bars 17 tothe tops of which are riveted horizontal, lengthwise angle bars 18 and horizontal, transverse angie bars 19 the standards 17 and the bars 18 and 19vbeing preferably of iron or some other strong and durable material comparatively unaffected b heat,`and the-bars v18, which run longitudi- 'nally within the baking chamber 15, are spaced apart for holding between Athem heatradiating means, such as ire bricks 21, so that the bricks thus cover the whole length of the angle bars 18. Longitudinally within the baking chamber 15 and extending through one of the end walls of the oven 7 is a gas burner in 'the form of a pipe 22, provided with the usual perforations 23 in the top thereof and with air inlets 24- outside of the oven and -being in any suitable manner attached to a source of gas supply, not shown, at its outer connection 25. y

Longitudinally .and rotatably mounted within and near the top of the chamber 15 -in sui-table bearings v26, 27 s a shaft 28, ex!

tending outwardly at one end of the'yoven 7 and being by gearing '29, suitably inclosed,

28 are secured, neary the end Walls ofthe chamber 15, respective sprocket wheels 34, 4

- endless sprocket chain 35, while the lower and in the lowermost position during their travel, to be directly above the heat-radiating means 21.

. v Within the chamber 15, ony each side of the heat-radiatin means 21 and preferably at the bottom o the chamber, is a suction pipe 42, provided with perforations 43 in its wall and connected with apump, not shown, and through one end Wall of the oven 7 extends a pipe 44, which is threaded for connection with a suitable water source, not shown, and

is provided with openings in itswall so that the water from the pipe 44 may drop upon the bricks 40 which are secured at the bottom of the chamber and directly below the pipe for 'the purpose of converting the water to steam when the bricks are heated.

In order to provide access to the baking chamber 15, the oven 7 is in front thereof 'y provided with a door 45, which. on its inner side is lined with bricks 46 of heat-insulating material. The door 45 is pivotally secured by hinges 47 to its frame 48, which is embedded in the wall and is riveted .to

Lthe frame 6, as shown at 49, and a suitable latch and handle means50 is also provided for -opening the door and for holding it tightl closed when the ovenI is in operation.

For t e purposev of facilitating 'inspection of the roduct in the chamber 15 during the baklng process, the doorv 45 has also therein a transparent late 51 of annealed glass or other heat-reslsting material.

Within the chamber 15, at the top and at the corners thereof, are pipes 52, the purpose of which will be explained hereinafter, and the pipes 52 are normallyv closed by ca s 53 secured thereon at their outer ends. n order to facilitate the moving and the installation of the oven 7, the oveILis at the lower corners of-'the frame 6 provided with casters 54, secured to respective gussets 55, which also servej vas braces for strengthening the frame.

When it is desired to use the oven 7, the product to be baked is placed on the trays 39; the motive power -for the shaft 28, and the pump for the suction pipes 42, are set in operation; the gas burner 22 is lighted, and water through the pipe 44 is supplied from its source, the door 45, of course, beingv closed during the 'baking process; The

heat-radiatin means 21, heated by the burner 22, wi l soon heat the whole chamber 15,'and, as the product isin constant motion toward or. away from the heatingy hot bricks 40 arises in the chamber r15 and moistens the product'and therebyV materially y aids the operator in temperingthe product. Before the exhaust from the burner 22 can rea-ch the product, the exhaust is carried l away through the suction pipes 42, which also relieve the internal pressure in the chamber. If for some reason, however, the internal pressure, in spite of the suction from the pipes 42, should become excessive,

the operator may remove one or more of the caps 53 from the pipes 52 and thereby instantly relieve the4 pressure, the pipes thus serving as auxiliary means to the suction pipes 42 forrelieving such pressure.

My'invention being thus fully and clearly described, what I claim as new and desire to secure by Letters Patent, is:

1. In an oven adapted forl baking purposes, the combination with a metallic frame for the top, the bottom and the sides of the oven, of horizontalv girders spaced for supporting heat-insulating material; metallic reticula secured against the outer and inner 'surfaces of said heat insulating material in the top and sides; and tile outside of the outer 'reticulum in the sides; said frame, girders, insulating material, reticula and tile being mortared together to form a homogeneous wall structure.

2. In an oven adapted for baking purposes, the combination with a metallic frame for the top, bottom and sides of the oven, of horizontal lengthwise and transverse girders s aced for supporting heat insulating matevrials; metallic reticula secured against the outer and inner surfaces of said insulatingV vmaterial in the top and sides; and tile outside of the outer reticulum in the sides; said frame, girders, insulating material, reticula and tile being mortared together to form a homogeneous wall structure.

3. In an oven adapted for poses, for the top, bottom, and sides of the oven,

horizontal lengthwise and transverse girders vertically spaced in the Sides thereof having inwardly projecting flanges forming pockets baking purthe combination with a metallic frame for supporting sections of heat insulating material; metallic reticula secured against.

the inner and outer surfaces of said insulatf' ing material in the top and sides; and tile outside of the outer reticulum i'n the sides; said'frame, girders, insulating material, reticula, and tile being mortared' together to form a homogeneous wall structure.

4. In an oven adapted for baking purposes, the combination with a metallic frame 'of horizontal lengthwise and transverse girders vertically spaced inthe sides and horizontal transverse girders, longitudinally spaced l' in the top and bottom; sald girders having flanges forming pockets for supporting heatinsulating bricks; metallic reticulav secured against the inner and outer surfaces of said insulatingbricks in the top and sides; and

tile outside of the outer reticulum in the sides, said frame, girders, insulating bricks, -10

Y ERNEST E. LINDSEY. 

